#region License, Terms and Conditions
//
// Jayrock - JSON and JSON-RPC for Microsoft .NET Framework and Mono
// Written by Atif Aziz (atif.aziz@skybow.com)
// Copyright (c) 2005 Atif Aziz. All rights reserved.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 2.1 of the License, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
//
#endregion

namespace Jayrock.Json.Conversion.Converters
{
    #region Imports

    using System;
    using System.ComponentModel;
    using System.Diagnostics;
    using CustomTypeDescriptor = Conversion.CustomTypeDescriptor;

    #endregion
    
    public sealed class ComponentImporter : ImporterBase
    {
        private readonly PropertyDescriptorCollection _properties; // TODO: Review thread-safety of PropertyDescriptorCollection

        public ComponentImporter(Type type) :
            this(type, null) {}

        public ComponentImporter(Type type, ICustomTypeDescriptor typeDescriptor) :
            base(type)
        {
            if (typeDescriptor == null)
                typeDescriptor = new CustomTypeDescriptor(type);
            
            _properties = typeDescriptor.GetProperties();
        }

        protected override object ImportFromObject(ImportContext context, JsonReader reader)
        {
            Debug.Assert(context != null);
            Debug.Assert(reader != null);

            reader.Read();
            
            object o = Activator.CreateInstance(OutputType);
            
            while (reader.TokenClass != JsonTokenClass.EndObject)
            {
                string memberName = reader.ReadMember();
               
                PropertyDescriptor property = _properties.Find(memberName, true);
                
                if (property != null && !property.IsReadOnly)
                    property.SetValue(o, context.Import(property.PropertyType, reader));
                else 
                    reader.Skip();
            }
         
            return ReadReturning(reader, o);
        }
    }
}
